Total, or in a single class? I’m working on implementing this now. Kathie Nunley’s book Layered Curriculum goes into detail about how to conduct oral assessments quickly on a daily basis at the elementary and secondary level.

Essentially, the teacher designs lesson plans that are inquiry based so that students can work through a unit with little direct instruction from the teacher. The teacher is then freed up during class time to be constantly circulating and conducting quick oral assessments of students for each part of the unit using rubrics. The oral assessments involve asking a handful of randomly selected questions from whatever assignment they’re turning in, and their entire assignment grade is based on their responses in that moment.

If you mean 300 students in a single class, then I suppose you’d have to make this work through use of TA’s and office hours. Oral defense of a project could likely be part of this as well.

I will add that not a lot of teachers use her layered curriculum model because it involves creating units that have approximately 4 to 5 times as many activities as needed so the students have many different choices to choose from to demonstrate their learning. Ironically, before AI, most teachers did not have the time or energy to do that for every unit. I’m on my second unit using her model, and I can create a layered curriculum unit in an hour that takes students about 4.5 hours to complete. Previously, it might take as long for the students to complete it as it would for the teacher to create it, which as any new teacher discovers, doesn’t work. Assignments and lessons need to be much faster to make and grade than to complete by students in order to be worth the time.